CN109296785B - Blower check valve - Google Patents
Blower check valve Download PDFInfo
- Publication number
- CN109296785B CN109296785B CN201811292757.7A CN201811292757A CN109296785B CN 109296785 B CN109296785 B CN 109296785B CN 201811292757 A CN201811292757 A CN 201811292757A CN 109296785 B CN109296785 B CN 109296785B
- Authority
- CN
- China
- Prior art keywords
- valve body
- valve
- proximity switch
- rotating shaft
- closing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 238000003723 Smelting Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention discloses a fan check valve, which comprises a valve body, wherein a valve block is arranged in the valve body, the valve block is hinged in the valve body through a rotating shaft, a circle of sealing check ring is arranged on the inner wall of the valve body, one end of the rotating shaft extends out of the valve body and is fixedly sleeved with a heavy hammer crank, one end of the heavy hammer crank is provided with a heavy hammer, the valve block always has a trend of rotating downwards around the rotating shaft to be in contact with the sealing check ring for sealing so as to completely close the valve body through the heavy hammer crank and the rotating shaft, the other end of the heavy hammer crank is provided with a proximity switch detection plate matched with the proximity switch, the outer wall of the valve body corresponding to the proximity switch detection plate is provided with the proximity switch when the valve block is completely closed, and a plurality of closing assisting cylinders for assisting the valve block to close the valve body are further arranged outside the valve body. The invention has the advantages that: the valve plate closing position of the fan check valve is accurate, so that the fan check valve closing signal is accurate and reliable, and the fan air stirring system can be operated safely and reliably.
Description
Technical Field
The invention relates to the technical field of auxiliary equipment for blast furnace smelting, in particular to a fan check valve for blast furnace smelting.
Background
In a blast furnace smelting production system, each blast furnace is matched with a blower, and the blower is communicated with the corresponding blast furnace through an air supply pipeline, so that in order to prevent blast furnace gas from flowing back into a compressor of the blower when the blower is disconnected, a blower check valve is generally required to be arranged at an outlet of the blower; meanwhile, in order to ensure smooth production, when the blower corresponding to one blast furnace fails, the blowers corresponding to the other blast furnaces can supply air to the blast furnace corresponding to the failed blower through the blower air-distributing system, and the blower air-distributing system comprises: the connecting pipelines are used for communicating the air supply pipelines, valves are arranged on each connecting pipeline and each air supply pipeline, and each valve is controlled by a fan air stirring system controller. In order to prevent cold air from being discharged from a shutdown fan after the fan air-distributing system is operated, one of the interlocking conditions of the operation of the fan air-distributing system is a fan check valve closing signal, but the existing fan check valve has the following defects: the valve block closing state is fuzzy, and the position of the valve block closing in place every time has certain deviation, so that a fan check valve closing signal is inaccurate and reliable, and the use safety of a system is affected.
Disclosure of Invention
The invention aims to provide a fan check valve with high safety and reliability.
In order to achieve the above purpose, the invention adopts the following technical scheme: a check valve of a fan comprises a valve body, wherein a valve block is arranged in the valve body, the valve block is hinged in the valve body through a rotating shaft, a circle of sealing check ring is arranged on the inner wall of the valve body, one end of the rotating shaft extends out of the valve body and is fixedly sleeved with a weight crank, one end of the weight crank is provided with a weight, the valve block always has a trend of rotating downwards around the rotating shaft to be in contact with the sealing check ring for sealing so as to completely close the valve body through the weight crank and the rotating shaft, the other end of the weight crank is provided with a proximity switch detection plate matched with the proximity switch, a proximity switch which can be matched with the proximity switch detection plate for detecting whether the valve block is closed or not is arranged on the outer wall of the valve body corresponding to the proximity switch detection plate when the valve block is completely closed, a plurality of closing assisting cylinders used for assisting the valve block to close the valve body are further arranged outside the valve body, a cylinder body of each closing assisting cylinder is fixed with the outer wall of the valve body, and a piston rod of each closing assisting cylinder is hinged with the weight crank.
Further, a fan check valve as described above, wherein: two closing-assisting air cylinders for assisting the valve plates to close the valve body are arranged outside the valve body, and piston rods of the two closing-assisting air cylinders are hinged with heavy hammer cranks on two sides of the rotating shaft respectively.
Further, a fan check valve as described above, wherein: the proximity switch passes through position adjustment subassembly and installs on the valve body, and position adjustment subassembly includes: the device comprises a proximity switch mounting plate for mounting a proximity switch and a horizontal fixing plate mounted on the outer wall of a valve body, wherein a strip-shaped hole axially arranged along the valve body is formed in the horizontal fixing plate, a long screw rod is vertically arranged at the top of the proximity switch mounting plate, extends upwards out of the strip-shaped hole of the horizontal fixing plate and is locked on the horizontal fixing plate through a pair of tightening nuts.
Through implementation of the technical scheme, the invention has the beneficial effects that: the valve plate of the fan check valve is closed in-place accurately, so that the in-place signal of the fan check valve is accurate and reliable, the fan air stirring system can be ensured to be put into operation safely and reliably, the risk of blast furnace air break slag filling is reduced, and the use safety of the system is improved.
Drawings
Fig. 1 is a schematic structural view of a fan check valve according to the present invention.
Fig. 2 is a schematic diagram illustrating a positional relationship between a proximity switch detection plate and a proximity switch shown in a left-view direction of fig. 1.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
As shown in fig. 1 and 2, the fan check valve comprises a valve body 1, a valve plate 2 is arranged in the valve body 1, the valve plate 2 is hinged in the valve body 1 through a rotating shaft 3, a circle of sealing check ring 4 is arranged on the inner wall of the valve body 1, one end of the rotating shaft 3 extends out of the valve body 1 and is fixedly sleeved with a weight crank 5, one end of the weight crank 5 is provided with a weight 6, the weight 6 enables the valve plate 2 to always rotate downwards around the rotating shaft 3 through the weight crank 5 and the rotating shaft 3 until the valve plate 2 contacts and seals with the sealing check ring 4, so that the valve body 1 is completely closed, a proximity switch detection plate 8 matched with the proximity switch 7 is arranged at the other end of the weight crank 5, and a proximity switch 7 which can be matched with the proximity switch detection plate 8 to detect whether the valve plate 2 is in place or not is arranged on the outer wall of the valve body 1 corresponding to the proximity switch detection plate 8 when the valve plate 2 completely closes the valve body 1; the valve body 1 is externally provided with a first closing assisting cylinder 9 and a second closing assisting cylinder 10 which are used for assisting the valve plate to close the valve body, a piston rod of the first closing assisting cylinder 9 and a piston rod of the second closing assisting cylinder 10 are respectively hinged with the heavy hammer cranks 5 on two sides of the rotating shaft, the valve plate can be ensured to be completely closed by the closing assisting cylinder, and the use stability and the safety of equipment are improved; in the present embodiment, the proximity switch 7 is mounted on the valve body 1 by a position adjusting assembly including: the proximity switch comprises a proximity switch mounting plate 11 for mounting the proximity switch 7 and a horizontal fixing plate 12 mounted on the outer wall of the valve body 1, wherein an elongated hole 13 is formed in the horizontal fixing plate 12 and is axially arranged along the valve body, an elongated screw rod 14 is vertically arranged at the top of the proximity switch mounting plate 11, the elongated screw rod 14 extends upwards out of the elongated hole 13 of the horizontal fixing plate 12 and is locked on the horizontal fixing plate 12 through a pair of alignment nuts 15, the front and rear positions of the proximity switch are synchronously adjusted by moving the elongated screw rod along the elongated hole, and the up and down positions of the proximity switch are synchronously adjusted by moving the elongated screw rod up and down in the elongated hole, so that the proximity switch is more convenient to mount and adjust;
the working principle of the invention is as follows:
when the blast furnace blower blows air, the valve plate 2 overcomes the gravity of the heavy hammer 6 under the action of wind force and rotates downwards along the air blowing direction around the rotating shaft 3 to open the valve body, when the blast furnace breaks down and breaks down, the valve plate 2 rotates around the rotating shaft 3 against the air blowing direction to be in contact with the sealing retainer ring 4 for sealing so as to completely close the valve body 1, meanwhile, the piston rod of the first closing assisting cylinder 9 moves downwards to pull down one end, close to the heavy hammer, on the heavy hammer crank 5, and the piston rod of the second closing assisting cylinder 10 moves upwards to lift one end, far away from the heavy hammer, on the heavy hammer crank 5, so that the valve plate 2 completely closes the valve body; in the process that the valve block 2 gradually closes the valve body under the action of the heavy hammer 6 and each closing assisting cylinder, the proximity switch detection plate 8 arranged on the heavy hammer crank 5 gradually approaches the proximity switch 7 upwards, when the valve block 2 completely closes the valve body 1, the proximity switch detection plate 8 just moves to the position corresponding to the proximity switch 7, at the moment, the proximity switch 7 can send an accurate valve block closing signal to a fan air-stirring system, and the fan air-stirring system automatically and safely puts into operation after receiving the valve block closing signal.
The invention has the advantages that: the valve plate of the fan check valve is closed in-place accurately, so that the in-place signal of the fan check valve is accurate and reliable, the fan air stirring system can be ensured to be put into operation safely and reliably, the risk of blast furnace air break slag filling is reduced, and the use safety of the system is improved.
Claims (1)
1. A fan check valve which is characterized in that: the valve body is internally provided with a valve block, the valve block is hinged in the valve body through a rotating shaft, the inner wall of the valve body is provided with a circle of sealing check ring, one end of the rotating shaft extends out of the valve body and is fixedly sleeved with a weight crank, one end of the weight crank is provided with a weight, the weight always has a trend of rotating downwards around the rotating shaft to be in contact with the sealing check ring through the weight crank and the rotating shaft so as to seal the valve block and completely close the valve body, the other end of the weight crank is provided with a proximity switch detection plate matched with a proximity switch, when the valve block completely closes the valve body, the outer wall of the valve body corresponding to the proximity switch detection plate is provided with a proximity switch which can be matched with the proximity switch detection plate to detect whether the valve block is closed in place, the outer part of the valve body is also provided with a plurality of closing assisting cylinders for assisting the valve block to close the valve body, the cylinder bodies of the closing assisting cylinders are fixed with the outer wall of the valve body, and piston rods of the closing assisting cylinders are hinged with the weight; two closing-assisting cylinders for assisting the valve plates to close the valve body are arranged outside the valve body, and piston rods of the two closing-assisting cylinders are hinged with heavy hammer cranks on two sides of the rotating shaft respectively; the proximity switch is arranged on the valve body through a position adjusting assembly, the position adjusting assembly comprises a proximity switch mounting plate for mounting the proximity switch and a horizontal fixing plate arranged on the outer wall of the valve body, a strip-shaped hole axially arranged along the valve body is formed in the horizontal fixing plate, a long screw rod is vertically arranged at the top of the proximity switch mounting plate, extends upwards out of the strip-shaped hole of the horizontal fixing plate and is locked on the horizontal fixing plate through a pair of alignment nuts; when the valve block is completely closed to the valve body, the proximity switch detection plate just moves to the position corresponding to the proximity switch, and at the moment, the proximity switch can send an accurate valve block closing signal to the fan air-stirring system, and the fan air-stirring system automatically and safely operates after receiving the valve block closing signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811292757.7A CN109296785B (en) | 2018-11-01 | 2018-11-01 | Blower check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811292757.7A CN109296785B (en) | 2018-11-01 | 2018-11-01 | Blower check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109296785A CN109296785A (en) | 2019-02-01 |
| CN109296785B true CN109296785B (en) | 2024-03-29 |
Family
ID=65145063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811292757.7A Active CN109296785B (en) | 2018-11-01 | 2018-11-01 | Blower check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109296785B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113551075B (en) * | 2020-04-25 | 2023-05-09 | 上海梅山钢铁股份有限公司 | Anti-jamming control device and control method for air outlet check valve of blast furnace blower |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990012349U (en) * | 1997-09-08 | 1999-04-06 | 원종수 | Twin Disc Type Check Valves |
| CN201787138U (en) * | 2010-09-10 | 2011-04-06 | 浙江鼎力阀门有限公司 | Obliquely-arranged sealing double-plate buffering check valve |
| CN202074084U (en) * | 2011-05-25 | 2011-12-14 | 西安三高阀门有限公司 | Butterfly check valve |
| CN103388692A (en) * | 2013-08-08 | 2013-11-13 | 中煤科工集团重庆研究院 | Gas pipeline check valve |
| JP2015087004A (en) * | 2013-11-01 | 2015-05-07 | 中国電力株式会社 | Impact reduction device and non-return valve using the same |
| CN108644433A (en) * | 2018-07-09 | 2018-10-12 | 江南阀门有限公司 | High exhaust check valve |
| CN209245365U (en) * | 2018-11-01 | 2019-08-13 | 联峰钢铁（张家港）有限公司 | A kind of blower non-return valve |
-
2018
- 2018-11-01 CN CN201811292757.7A patent/CN109296785B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990012349U (en) * | 1997-09-08 | 1999-04-06 | 원종수 | Twin Disc Type Check Valves |
| CN201787138U (en) * | 2010-09-10 | 2011-04-06 | 浙江鼎力阀门有限公司 | Obliquely-arranged sealing double-plate buffering check valve |
| CN202074084U (en) * | 2011-05-25 | 2011-12-14 | 西安三高阀门有限公司 | Butterfly check valve |
| CN103388692A (en) * | 2013-08-08 | 2013-11-13 | 中煤科工集团重庆研究院 | Gas pipeline check valve |
| JP2015087004A (en) * | 2013-11-01 | 2015-05-07 | 中国電力株式会社 | Impact reduction device and non-return valve using the same |
| CN108644433A (en) * | 2018-07-09 | 2018-10-12 | 江南阀门有限公司 | High exhaust check valve |
| CN209245365U (en) * | 2018-11-01 | 2019-08-13 | 联峰钢铁（张家港）有限公司 | A kind of blower non-return valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109296785A (en) | 2019-02-01 |
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